#include <bits/stdc++.h>
using namespace std;

int main() {
	int t;
	cin>>t;
	while(t--){
		int n;
		cin>>n;
		vector<int> a(n);
		int sum=0,count=0;
		for(int i=0;i<n;i++){
			cin>>a[i];
			sum+=a[i];
			if(a[i]==-1) count++;
		}
		if(sum>=0 && count%2==0) cout<<0<<endl;
		else if(sum>0 && count%2!=0) cout<<1<<endl;
		else{
			if(sum%2==0 && count%2==0) cout<<-(sum)/2<<endl;
			else if(sum%2==0 && count%2!=0) cout<<-(sum)/2 + 1<<endl;
			else if(sum%2!=0 && count%2==0) cout<<-(sum)/2 + 1<<endl;
			else cout<<-(sum)/2<<endl;
		}
	}
	return 0;
}